JPH04330954A - Maintenance-free air purifying device - Google Patents

Abstract

PURPOSE:To obtain an air purifying device unnessary for fiber exchange and maintenance-free and having small scale and high efficiency by providing a center rod part capable of separating purified air from the vicinity of the center rod and air containing dust from peripheral area thereof by forming a revolving cyclon flowing. CONSTITUTION:A center rod 2 is provided at a center of a cylindrical body 1 and a fan 4 or a guide plate 4 is provided at the top or upper part of the center rod 2. By this fan 4 or guide plate 4', or by both of them, a revolving cyclone flow 3 is formed arround the center rod 2, dust-free purified air 5 is recovered from the neighborhood of under part of the center rod 2, and air containing dust 6 is recovered from the vicinity of inside wall of the cylindrical body 1. Thus, an air purifying device unnecessary for filter exchange and maintenance-free and having small scale and high efficiently can be obtained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a maintenance-free air purification device. More specifically, the present invention relates to a new maintenance-free air purification device that is capable of highly efficiently collecting dust mites, pollen, etc., which are outdoor and indoor allergens, and that can be used for long periods of time without maintenance. It is.

0002

[Prior art and its problems] In recent years, the demand for healthy and comfortable living through improved living environments has increased, and in particular, as the insulation and airtightness of residences have improved, indoor ventilation,
There is a strong demand for indoor air purification. This air purification is also attracting attention because of its association with indoor air pollution, the occurrence of dust mites, and the onset of allergies caused by outdoor pollen and the like.

[0003] Until now, vacuum cleaners with a dust mite removal function, air conditioners,
Alternatively, various types of air purifiers have been developed and put into practical use, but all of them rely on a so-called filter type for their dust removal function. In this filter method, a filter having a membrane of, for example, 5 to 10 μm is installed in the air flow path to remove dust mites, pollen, etc.
The purpose is to remove dust such as dirt and dust.

However, in the case of this filter method, the effective period of use of the filter is short, and the filter needs to be replaced every one month at most. Adsorption of fine particles to the filter causes the filter to become clogged, making it impossible to maintain its function as a filter. For this reason, it is necessary to frequently replace the filter, but in reality, there are almost no measures taken to do so. Vacuum cleaners with dust mite removal functions are starting to become popular, but the situation is the same; in reality, indoor and outdoor dust such as dirt, dust, dust mites, and pollen are re-dispersed as airflow passes through a filter and scattered indoors. There are often

The present invention was made in view of the above circumstances, and it overcomes the drawbacks of conventional filter-type dust removal purification devices, and in particular eliminates dust mites and pollen, which have become a problem in indoor air purification. The purpose of the present invention is to provide a highly efficient, maintenance-free air purification device that is useful for removing dust such as allergens and does not require filter replacement.

[0006]

[Means for Solving the Problems] This invention solves the above problems by having a central rod portion and separating purified air from the vicinity of the central rod portion and dust-containing air from the surrounding area by forming a cyclone flow. To provide a maintenance-free air purification device characterized by: This maintenance-free air purification device is the result of further study by the inventor of the present application regarding the method of removing suspended particles using straight cyclone flow or axial cyclone flow, and it is a maintenance-free air purification device that is highly efficient and maintenance-free for a long period of time. It is characterized as a cyclone purification device with further developed features as a purification device.

[0007] The maintenance-free air purifying device of the present invention will be explained below with reference to the attached drawings.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an air purifying apparatus according to the present invention. For example, as illustrated in Figure 1,
The device of this invention has a cylinder (1
) is provided with a rod part (2) at the center thereof, and a swirling cyclone flow (3) is formed around this central rod part (2). For this reason, a fan (4) or a guide vane (4) is provided at the top of this rod portion (2) or above it.
') will be provided. This fan (4) or guide vane (4'
) or both, a cyclonic flow (3) is formed around the central rod part (2), and dust-free purified air (5) is collected from the area near the lower rod part (2). Also, dust-containing air (6) is recovered from the area near the inner wall of the cylinder (1).

FIG. 2 shows another example, in which air (7) is supplied from the lateral direction, that is, the tangential direction, at the upper part of the cylinder (1), and the cyclone flow (8) is directed to the central rod. It is generated around part (2). Furthermore, FIG. 3 shows another embodiment. Similarly, the center rod part (2)
dust-free purified air (9) downstream near the rod part (2).
) is collected, and dust-containing air (10) is collected from its surroundings.

[0010] In addition to the upper fan (4) or guide vanes, a downstream fan may also be provided. This is to maintain swirling flow. For this reason, it is not necessarily necessary to force the rotation, and it may be made to rotate freely according to the airflow. For example, the central rod part (2) as shown above
In the air purifying device of the present invention having the rod portion (2), the dust-free effect is much better than that without the rod portion (2). Therefore, cleaning can be achieved with higher efficiency.

FIGS. 4 and 5 illustrate the separation performance of the device of the invention with guide vanes. Guide vane angle (β), air flow rate (Q), device cylinder radius (R2
), the central rod diameter (Rc), and the cyclone flow duration distance (Z). It also shows the particle size Dp of the dust.

Dust separation efficiency ηs=1, that is, 10
Figures 4 and 5 show the case of 0% separation. For example, from Figure 5, the swirling flow is equal to the radius of the cylinder (Z=R2
) only lasts (A), the diameter (Z=2R2
) This indicates that approximately twice the flow rate (Q) is required to separate dust of the same particle size compared to the case where the particle size persists.

[0013] Then, the intake flow rate of air from the fan is 1
~3 (m3/min), β=15°, R2
= 5cm, 4. at 1m3/min when Z=2R2.
It can separate 100% of dust of 5 μm or more, and 100% of dust of 2.7 μm or more can be separated at 3 m3/min.
This shows that it can be separated. Normally, the particle size of dust is 2 to 20 μm for mold and 1 to 100 μm for sedimentary atmospheric dust.
m, pollen size is 20 to 50 μm, etc., so it is possible to separate almost 100% of these dusts without much difficulty.

[0014] The most distinctive feature of this type of air purification device using a swirling cyclone flow is that efficient purification can be achieved over a long period of time without clogging, which is the case with conventional filter systems. It is. Effective separation is achieved for dust particles having a diameter of 1 μm or more. Therefore, its application as a simple indoor air purification device is expected.

For example, the air purifying device of the present invention is effective when installed outdoors and supplying purified air indoors. Alternatively, as illustrated in FIG. 6, it may be attached to a home bed/clean booth (11) for the purpose of preventing allergic patients due to pollen etc. from having seizures while sleeping. In this case, for example, a space divided by a sheet (12) surrounding a bed or the like can be made to have a positive pressure, and clean air can be sent through a maintenance-free air purification device (13). This air purification device (13
) is supplied with air by a fan (14). The dust-containing air may be discharged to the outside through a duct, or may be treated with a cartridge-type filter (15) as illustrated in FIG. 6 and circulated indoors. At this time, in the booth, from the head to the feet,
It is also preferable to form an air flow outside the booth.

Of course, the maintenance-free air purifying device of the present invention can be utilized in various other ways. This device may also be used in combination with various devices such as blowers, air conditioners, and even filters.

[0017]

As described in detail above, the present invention provides an air purifying device that is compact, maintenance-free, and achieves an efficient dust-free effect without the need for filter replacement as in the prior art. It can be applied to various fields such as outdoor purification equipment or indoor clean booths.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the present invention.

FIG. 2 is a sectional view showing another embodiment.

FIG. 3 is a sectional view showing yet another embodiment.

FIG. 4 is a correlation diagram between the dust particle diameter and the cylindrical radius of the purification device as an example of the present invention.

FIG. 5 is a correlation diagram between dust particle diameter and flow rate.

FIG. 6 is a perspective view showing an example in which the purification device of the present invention is used in a clean booth.

[Explanation of symbols]

1 cylinder body 2 Center rod part 3　Swirling cyclone flow 4 Fan 4' Guide vane 5. Purified air 6 Dust-containing air 7 Sky Qi 8 Cyclone flow 9 Purified air 10 Dust-containing air 11 Clean booth 12 Sheet 13 Dust-free purification device 14 Fan 15 Cartridge filter

Claims (3)

[Claims] 1. A maintenance-free air purification device having a central rod portion and separating purified air from the vicinity of the central rod portion and dust-containing air from the surrounding area by forming a cyclone flow. 2. An outdoor air purification device comprising the maintenance-free air purification device according to claim 1. 3. An indoor clean booth comprising the maintenance-free air purification device according to claim 1.